Finding the Fourth Proportional to 12,819.06, 17,687.88 and 7,513.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,819.06 : 17,687.88 = 7,513.74 : x
2. Step 2: Convert to fraction form
   12,819.06/17,687.88 = 7,513.74/x
3. Step 3: Cross multiply
   12,819.06x = 17,687.88 × 7,513.74
4. Step 4: Simplify right side
   12,819.06x = 132,902,131.47
5. Step 5: Solve for x
   x = 132,902,131.47/12,819.06
6. Step 6: Final answer
   x = 10,367.54